In the present work numerical modeling results were obtained for single fiber pull-out of elastic matrix. Obtained results are compared with the experimental data for single steel fiber pull-out of high strength concrete matrix. Fiber is behaving elasto-plastically. The pull-out process was studied by means of accurate 3D elasto-plastic modeling. Numerical modeling takes into account the non-linearity of material for finite element method (FEM). Numerical modeling was performed for straight-shape fiber embedded into elastic matrix under variable angles to applied pulling force and at variable depth. Friction between fiber and matrix, concrete matrix shrinkage, and elastic and plastic deformations in fiber were investigated. Compared to experimental data, the objective of numerical modeling was to evaluate the significance of different phenomena such as friction between steel fiber and concrete matrix, matrix shrinkage and fiber’s plasticity in single fiber pull-out process. The numerical values of the parameters of steel fiber in concrete matrix were successfully obtained and analyzed. The reason of insignificant non-coincidence of the results of numerical modeling and experimental data was analyzed. As a result, was proposed a hypothesis about the “plato” appearance in diagram force-displacement. It can be explained by plugs formation in concrete matrix channel.